Earlier quoted context omitted.
> It's highly ignorant to call unvaccinated Americans idiots. Agreed. The correct term for them is "immoral". The only world in which it makes sense to forgo the vaccine is one in which your life is only one that matters. So a healthy unvaccinated person is making a perfectly rational decision, just a morally bankrupt one.
How is it morally bankrupt to care about yourself more than people you don't know?
It is immoral for the same reason as refusing to help others survive at zero cost to you.